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Radiation disinfestation of grains and cocoa beans

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by Appiah, V. (Ghana Atomic Energy Commission, Legon, Accra (Ghana). Dept. of Biology, Food and Agriculture)

A series of experiments has been performed by Ghanaian scientists from 1977 to 1987 to evaluate the seriousness of infestation and to establish effective doses for radiation disinfestation against insects and fungi which cause deterioration in grains and cocoa beans. Supporting investigations have been done on the effect of radiation disinfestation on some quality parameters and wholesomeness of grains (with maize as the test grain) and cocoa beans. A minimum dose of 0.8 kGy was established for effective control of insects present in stored grains and cocoa beans. For the decontamination against fungi and yeasts, a combination of moist heat (85% RH) applied to 60 deg. C for 30 min followed by a dose of 4 kGy was effective for maize and moist heat (85% RH) applied 80 deg. C and a dose of 4 kGy was recommended for cocoa beans. No significant difference was found between the organoleptic qualities of the products from maize and cocoa that had been treated with moist heat and radiation and the untreated samples. The cooling (solidifying) curves of cocoa butter prepared from untreated and treated cocoa beans were very similar. Irradiated cocoa beans were found to be wholesome. The prospects of radiation disinfestation of grains and cocoa beans have also been discussed. (author). 27 refs, 4 tabs

Source/Report: International Atomic Energy Agency, Vienna (Austria); Food and Agriculture Organization of the United Nations, Rome (Italy); 232 p; Dec 1990; p. 177-188; International seminar on food irradiation for developing countries in Africa; Dakar (Senegal); 15-19 Feb 1988; IAEA-TECDOC–576

Publ. Year: 1990

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